In my opinion, it is not only in Phetchaburi, why is it not also done in other districts like Lopburi, Hua-hin, and more.
Or maybe it is because no one wants to visit the palace on the hill anymore.
I was already assuming railways, but unloading and loading containers by rail too takes a lot of time, and the train really isn't going to run for 10 containers, but we'll see if it ever gets there.